In what ways did Napoleon lie to the animals about his dealings with Frederick and Pilkington?

Napoleon continues to negotiate with Mr. Frederick and Mr. Pilkington, though the timber remains unsold. Rumors of Mr. Frederick’s plans to overthrow the farm continue. In the summer, three hens confess to plotting against Napoleon’s life and are executed instantly. After that, Napoleon increases his security even more and enlists a pig named Pinkeye to be his taster, lest someone attempt to poison him. Napoleon finally agrees to sell the timber to Pilkington, as well as to engage in regular trade with Foxwood. Meanwhile, rumors about Frederick’s coming invasion, as well as his cruel practices at Pinchfield, begin to circulate. One day, Napoleon announces that he never planned to do business with Frederick at all. He makes the messenger pigeons change their slogan from “Death to Humanity” to “Death to Frederick” (103). He also, strangely, forbids them from going to Foxwood.